I purchased a pair of Samsung SSG-3100 GB glasses and I can't get them to pair with my Samsung P51D550C1F 3D TV (both the glasses and the TV are 2011 models). A Best Buy tech where I purchased the glasses asked if I had a 3D rated HDMI cable. My HDMI cable is over 5 years old so it may not be. Does this seem like a likely problem??? My source of 3D programming is Direct TV.